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A revolutionary method to drastically reduce stray light on space telescopes


A revolutionary method to drastically reduce stray light on space telescopes

A crew of researchers on the Centre Spatial de Liège (CSL) of the College of Liège has simply developed a method to determine the contributors and origins of stray light on space telescopes. It is a main advance within the subject of space engineering that may assist in the acquisition of even finer space pictures and the event of more and more environment friendly space devices. This research has simply been revealed within the journal Scientific Experiences.

Space telescopes have gotten an increasing number of highly effective. Technological developments in recent times have made it potential, for instance, to observe objects additional and additional into the universe or to measure the composition of the Earth’s ambiance with ever better precision. Nonetheless, there’s nonetheless one issue limiting the efficiency of those telescopes: stray light. A phenomenon that has been recognized fora very long time, stray light leads to light reflections (ghost reflections between lenses, scattering, and many others.) that injury the standard of pictures and sometimes lead to blurred pictures. Till now, the strategies for checking and characterizing this stray light throughout the growth part of the telescopes have been very restricted, making it potential to ‘simply know’ whether or not or not the instrument was delicate to the phenomenon, forcing engineers to revise all their calculations in optimistic circumstances, main to appreciable delays within the commissioning of those superior instruments.

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Researchers on the Centre Spatial de Liège (CSL), in collaboration with the College of Strasbourg, have simply developed a revolutionary method for fixing this downside by utilizing a femto-second pulsed laser to ship light beams to illuminate the telescope. “Stray light rays take (within the telescope) completely different optical paths from the rays that kind the picture,” explains Lionel Clermont, an professional in space optical methods and stray light at CSL. Thanks to this, and utilizing an ultra-fast detector (of the order of 10-9 seconds of decision, i.e. a thousandth of a millionth of a second), we’re measuring the picture and the completely different stray light results at completely different instances. As well as to this decomposition, we are able to determine every of the contributors utilizing their arrival instances, that are straight associated to the optical path, and thus know the origin of the issue.”

The CSL engineers have now demonstrated the effectiveness of this method in a paper, simply revealed within the journal Scientific Experiences, through which they current the primary movie displaying ghost reflections in a refractive telescope arriving at completely different instances. “Now we have additionally been ready to use these measurements to reverse engineer theoretical fashions,” says Lionel Clermont, “which is able to make it potential, for instance, to construct higher picture processing fashions sooner or later.” By correlating these measurements with numerical fashions, the scientists will now give you the chance to decide exactly the origin of the stray light and thus act accordingly to enhance the system, each by enhancing the {hardware} and with the event of correction algorithms.

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Greater than only a scientific curiosity, this method developed on the CSL may nicely lead to a small revolution within the subject of high-performance space devices. “Now we have already obtained quite a lot of curiosity from the ESA (European Space Company) and from industrialists within the space sector,” says Marc Georges, an professional in metrology and lasers at CSL and co-author of the research. This method responds to an pressing downside that has been unresolved till now.” Within the close to future, CSL researchers intend to proceed the event of this method, to enhance its TRL (Know-how Readiness Stage) and produce it to an industrial stage. An industrial utility is already deliberate for the FLEX (Fluorescence Explorer) challenge, an earth commentary telescope that’s a part of ESA’s Dwelling Planet Program. The researchers hope to give you the chance to apply it to scientific devices as nicely.

supply: DOI: 10.1038/s41598-021-89324-y      https://www.uliege.be/cms/c_8699436/fr/uliege

A revolutionary method to drastically reduce stray light on space telescopes

A new lens for life-searching space telescopes

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